1271616 has 56 divisors (see below), whose sum is σ = 3474720. Its totient is φ = 410112.

The previous prime is 1271609. The next prime is 1271657. The reversal of 1271616 is 6161721.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7015 + ... + 7193.

2^1271616 is an apocalyptic number.

1271616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737360).

1271616 is an abundant number, since it is smaller than the sum of its proper divisors (2203104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271616 is a wasteful number, since it uses less digits than its factorization.

1271616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 221 counting only the distinct ones).

The product of its digits is 504, while the sum is 24.

The square root of 1271616 is about 1127.6595230831. The cubic root of 1271616 is about 108.3391260545.

The spelling of 1271616 in words is "one million, two hundred seventy-one thousand, six hundred sixteen".